CN108432328A - Wireless communication device and terminal installation - Google Patents
Wireless communication device and terminal installation Download PDFInfo
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- CN108432328A CN108432328A CN201780005413.0A CN201780005413A CN108432328A CN 108432328 A CN108432328 A CN 108432328A CN 201780005413 A CN201780005413 A CN 201780005413A CN 108432328 A CN108432328 A CN 108432328A
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- 238000009434 installation Methods 0.000 title claims abstract description 82
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
- H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
- H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
- H04W74/085—Random access procedures, e.g. with 4-step access with collision treatment collision avoidance
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
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Abstract
Wireless communication device as transmission route winner efficiently sends frame to multiple terminal installations and sends instruction.The wireless communication device of the present invention has sending part, send the first frame for obtaining transmission opportunity, instruction is sent at least one of the multiple terminal installation by the trigger frame of the transmission of the second frame of destination of device itself in the transmission opportunity, the third frame by least one of the multiple terminal installation as a purpose is sent in the transmission opportunity, the value for the transmission opportunity that the expression third frame recorded in second frame is obtained, it is different from the value that the value of the expression transmission opportunity recorded in the first frame divided by expression terminate to second frame traffic obtained by the value of passed through period since being sent the first frame.
Description
Technical field
The present invention relates to a kind of wireless communication device and terminal installations.
Background technology
By IEEE (The Institute of Electrical and Electronics Engineers Inc.：Electricity
Gas and Electronic Engineering Association) realization has been formulated as Wireless LAN (Local Area Network：WLAN) standard
The IEEE802.11ac of the further high speed of IEEE802.11.Currently, as the subsequent standards of IEEE802.11ac, start
The standardization activity of IEEE802.11ax.Quick with wireless LAN device is popularized, and is carried out in IEEE802.11ax standardization
Improve under the overstocked configuration surroundings of wireless LAN device the quantifier elimination of handling up of each user.
In the IEEE 802.11 standards, each terminal installation is based on collision sense multiple multiplexing access/collision and avoids agreement
(Carrier sense multiple access/collision avoidance：CSMA/CA), wireless medium is accessed.Eventually
As long as the reception power for the frame that end device receives is not less than defined threshold value, it can be judged as busy shape into wireless medium is about to
The Physical carrier sense of state.
Wireless LAN device can based on the frame length recorded in the physical layer of frame and the header information of MAC layer that receive
Or the Frame switch period establishes associated information (information of Length fields record, Duration (duration)/id field note
The information of load), to set period (the Network allocation vector for forbidding sending frame：NAV).Set NAV when
Wireless medium is judged as that busy condition, the setting of NAV are also referred to as virtual carrier sensing in wireless network communication by section due to terminal installation.It is another
Period needed for the communication of device itself can be recorded in frame and sent by aspect, wireless LAN device.Have received other nothings of the frame
The slot setup is NAV by line lan device, therefore has sent the wireless LAN device of the frame within the period for being recorded in the frame
Wireless medium can freely be used.It will freely use the period of the wireless medium to be known as transmission route and obtain the period
(Transmission opportunity (transmission opportunity)：TXOP), the wireless LAN device for holding the transmission opportunity is known as sending out
Send power holder (TXOP holder).
TXOP holder can send other wireless LAN devices instruction frame in the transmission opportunity that device itself is obtained.
For example, in IEEE802.11-2012 standards, as one of the mechanism, specification RDP (Reverse direction
protocol：Remote Desktop Protocol) (with reference to non-patent literature 1).
On the other hand, in IEEE802.11ax standards, the multiple access of frame is simultaneously sent as multiple wireless LAN devices
Mode, in addition to multiplexing input multiplexing output (Multi-user by the multi-user of IEEE802.11ac standard criterions
multiple-input multiple-output：MU-MIMO other than), also in research orthogonal frequency division multiple access (Orthogonal
frequency division multiple access：OFDMA importing) (with reference to non-patent literature 2).
Existing technical literature
Non-patent literature
Non-patent literature 1：IEEE Std 802.11TM-2012, March 2012.
Non-patent literature 2：IEEE 11-13/1395r2, in November, 2013.
Invention content
Problems to be solved by the invention
In previous IEEE802.11 standards, TXOP holder can be during the transmission opportunity that device itself is obtained
Other-end device instruction frame is sent.But in previous mechanism, TXOP holder's is carried out to each terminal installation
Frame sends instruction.Therefore, in the case of multiple access is imported under IEEE802.11ax standards, TXOP holder can not be to multiple
Terminal installation simultaneously indicates that frame is sent.
The present invention is to complete in view of the above problems, it is intended that disclosing a kind of wireless communication device and end
End device simultaneously sends in the communication system of frame multiple terminal installations, is obtained as transmission route premised on carrier sense
Multiple terminal installations can be efficiently sent frame transmission instruction by obtaining the wireless communication device of person.
Technical solution
To solve the above-mentioned problems, the wireless communication device and terminal installation of a scheme of the invention are as follows.
(1) that is, the present invention a scheme wireless communication device be can be communicated with multiple terminal installations it is wireless
Communication device has：Sending part sends the first frame for obtaining transmission opportunity, in the transmission opportunity, certainly with device by instruction
It is sent at least one of the multiple terminal installation as the trigger frame of the transmission of the second frame of destination, in the transmission
In chance, third frame by least one of the multiple terminal installation as a purpose is sent, recorded in second frame
, value that indicate the transmission opportunity that the third frame is obtained, with it is recorded in the first frame, indicate that the value of transmission opportunity is removed
To indicate to terminate the value difference obtained by the value of passed through period to second frame traffic since being sent the first frame.
(2) in addition, the wireless communication device of the scheme of the present invention is the wireless communication device described in above-mentioned (1), institute
The value for stating the transmission opportunity that the expression third frame of the sending part recorded in the third frame is obtained, than the first frame institute
It the value of the expression transmission opportunity of record divided by indicates that the first frame is sent and starts to terminate to be passed through to second frame traffic
In the case that value obtained by the value of period is small, the sending part sends the third frame without implementing carrier sense.
(3) in addition, the wireless communication device of the scheme of the present invention is the wireless communication device described in above-mentioned (1), institute
State the information for the transmission opportunity that sending part is obtained in the trigger frame comprising expression second frame.
(4) in addition, the wireless communication device of the scheme of the present invention is the wireless communication device described in above-mentioned (3), institute
The length for stating the transmission opportunity that the second frame is obtained, be the expression transmission opportunity recorded in the first frame value divided by indicate from
The first frame, which is sent, to be started to terminate the period represented by the value obtained by the value of passed through period to second frame traffic.
(5) in addition, the wireless communication device of the scheme of the present invention is the wireless communication device described in above-mentioned (1), tool
It is standby：Receiving part sends the case where not receiving second frame in the defined period after the first frame in the sending part
Under, judge being failed for the transmission opportunity.
(6) in addition, the wireless communication device of the scheme of the present invention is the wireless communication device described in above-mentioned (5), institute
Sending part is stated in the case where the receiving part judges the acquisition failure of the transmission opportunity, sends and indicates to abandon the transmission
The frame of chance.
(7) in addition, the wireless communication device of the scheme of the present invention is the wireless communication device described in above-mentioned (1), institute
The value for stating the transmission opportunity that the expression third frame of the sending part recorded in the third frame is obtained, than the first frame institute
The value of the expression transmission opportunity of record divided by expression terminate to be passed through since being sent the first frame to second frame traffic
Period value obtained by value it is big in the case of, send and indicate to abandon the frame of the transmission opportunity, institute is abandoned having sent expression
After the frame for stating transmission opportunity, implement carrier sense.
(8) in addition, the terminal installation of the scheme of the present invention is the terminal installation communicated with wireless communication device,
Have：Receiving part receives the first frame for obtaining the transmission opportunity sent by the wireless communication device；And autonomous distributed controll
Portion, the information setting NAV of the period based on the expression transmission opportunity recorded in the first frame, the autonomous distributed controll
Portion does not receive to record within the defined period after having received the first frame and indicate belonging to the wireless communication device
BSS information frame in the case of, reset the NAV.
(9) in addition, the terminal installation of the scheme of the present invention is the terminal installation described in above-mentioned (8), the receiving part
Have the function of receiving trigger frame, trigger frame instruction by the wireless communication device send with the wireless communication device
For the transmission of the frame of destination, and has sending part, based on by the BSS different from the BSS belonging to the wireless communication device
Information recorded in the frame of transmission is come the case where setting NAV, and receive the trigger frame in the period of the NAV in the setting
Under, it does not send using the wireless communication device as the frame of destination.
(10) described to connect in addition, the terminal installation of the scheme of the present invention is the wireless communication device described in above-mentioned (8)
Receipts portion receives the frame for abandoning the transmission opportunity for indicating to be sent by the wireless communication device, has sending part, is receiving
Frame is sent after to the frame for indicating to abandon the transmission opportunity, the frame indicates：It has sent expression and abandons the conveyer
The frame of meeting.
Advantageous effect
A scheme according to the present invention, the wireless communication device as transmission route holder can be to multiple terminal installations height
Effect ground sends frame and sends instruction.Therefore, multiple terminal installations can efficiently access wireless medium, therefore can help to Wireless LAN
The improvement of the user throughput of equipment.
Description of the drawings
Fig. 1 is an exemplary figure of the frame structure for indicating the scheme of the present invention.
Fig. 2 is an exemplary figure of the frame structure for indicating the scheme of the present invention.
Fig. 3 is an exemplary figure of the communication for indicating the scheme of the present invention.
Fig. 4 is the synoptic diagram of the split example for the wireless medium for indicating the scheme of the present invention.
Fig. 5 is the figure of a configuration example of the communication system for indicating the scheme of the present invention.
Fig. 6 is the block diagram of a configuration example of the wireless communication device for indicating the scheme of the present invention.
Fig. 7 is the block diagram of a configuration example of the wireless communication device for indicating the scheme of the present invention.
Fig. 8 is an exemplary figure of the communication for indicating the scheme of the present invention.
Fig. 9 is an exemplary figure of the communication for indicating the scheme of the present invention.
Specific implementation mode
Communication system in present embodiment has wireless base station apparatus (access point, base station apparatus：Access point、
Base station apparatus) and multiple radio receivers (stand, terminal installation：Station, terminal installation).In addition, will be by base station apparatus
The network constituted with terminal installation is known as basic service set (BSS：Basic service set, range of management).In addition, also will
Base station apparatus and terminal installation are referred to as wireless device.
Base station apparatus and terminal installation in BSS are based respectively on CSMA/CA (Carrier sense multiple
access with collision avoidance：Carrier Sense Multiple Access and collision avoidance protocol) it is communicated.
In present embodiment, the basic schema (infrastructure mode) that is communicated with multiple terminal installations with base station apparatus
Special pattern (adhoc that can also be directly to be communicated between terminal installation for the method for object, but present embodiment
Mode it) executes.In special pattern, terminal installation replaces base station apparatus, forms BSS.Also the BSS in special pattern is known as
IBSS(Independent Basic Service Set：Independent basic service set).Hereinafter, can also will be in special pattern
The terminal installation for forming IBSS is considered as base station apparatus.
In IEEE802.11 systems, each device can send the transmission frame of multiple frame types with shared frame format.
Frame is sent respectively by physics (Physical：PHY) layer, media access control (Medium access control：MAC) layer, patrol
It collects link and controls (LLC：Logical Link Control) layer defines.
The transmission frame of PHY layer is referred to as physical protocol data unit (PPDU：PHY protocol data unit, physics
Layer frame).PPDU by comprising for carry out the header information of signal processing of physical layer etc. physical layer header (PHY headers) and
Physical service data unit (PSDU as the data cell handled in physical layer：PHY service data unit,
Mac layer frame) etc. compositions.PSDU can be by having polymerize the Medium Access Control (MAC) Protocol Data Units of multiple re-transmission units as wireless section
(MPDU：MAC protocol data unit) polymerization MPDU (A-MPDU：Aggregated MPDU) it constitutes.
Include in PHY headers：Reference signal, the short training field (STF of detection/synchronization for signal etc.：Short
Training field), the long training field (LTF for obtaining channel information for data demodulation：Long training
field)；And control signal, include the signal (Signal of control information for data demodulation：SIG) etc..In addition, STF roots
It is tradition STF (L-STF according to corresponding criteria classification：Legacy-STF), high-throughput STF (HT-STF：High
Throughput-STF), ultra-high throughput STF (VHT-STF：Very high throughput-STF), high efficiency STF (HE-
STF：High efficiency-STF) etc., LTF, SIG are similarly classified as L-LTF, HT-LTF, VHT-LTF, HE-LTF, L-
SIG、HT-SIG、VHT-SIG、HE-SIG.VHT-SIG is also categorized into VHT-SIG-A1, VHT-SIG-A2 and VHT-SIG-B.
Similarly, HE-SIG is classified as HE-SIG-A1~4 and HE-SIG-B.
Moreover, the information that PHY headers can include the BSS for the transmission member for identifying the transmission frame (is identified hereinafter also referred to as BSS
Information).The information of identification BSS for example can be SSID (the Service Set Identifier of the BSS：Service set
Symbol), the MAC Address of the base station apparatus of the BSS.In addition, the information of identification BSS can be BSS other than SSID, MAC Address solid
Some values (for example, BSS Color etc.).
PPDU is modulated according to corresponding standard.For example, if IEEE802.11n standards, then be modulated to orthogonal frequency multichannel
Divide multiplexing (OFDM：Orthogonal frequency division multiplexing) signal.
MPDU is by comprising for carrying out the MAC layer header (MAC in the header information of signal processing of MAC layer etc.
Header), as the MAC Service Data Unit (MSDU of the data cell handled in MAC layer：MAC service data
Unit) or frame and verification frame in whether vicious frame inspection portion (Frame check sequence：FCS it) constitutes.
In addition, multiple MSDU can also be polymerized to polymerization MSDU (A-MSDU：Aggregated MSDU).
The frame type of the transmission frame of MAC layer is divided into three categories：Management frame, the connection status etc. between managing device；Control frame,
Communications status between managing device；And data frame, including actual transmission data, can also further be classified as a variety of respectively
Subframe type.Include reception end notification (Ack in control frame：Acknowledge) frame, transmission request (RTS：Request
To send) frame, receive prepare terminate (CTS：Clear to send) frame etc..In management frame comprising beacon (Beacon) frame,
Probe requests thereby (Probe request) frame, probe response (Probe response) frame, certification (Authentication) frame,
Connection request (Association request) frame, connection response (Association response) frame etc..In a data frame
Including data (Data) frame, poll (CF-poll：Contention free-poll) frame etc..Each device can be contained in MAC header by reading
The content of frame control field holds the frame type and subframe type of the frame received.
It should be noted that can also include Block Ack in Ack.Block Ack can be executed for multiple MPDU's
Receive end notification.
Include the field (Field) for recording the period (Beacon interval), SSID that send beacon within a beacon frame.
Base station apparatus periodically the broadcast beacon frame into BSS, terminal installation can hold terminal installation week by received beacon frame
The base station apparatus on side.By terminal installation based on the beacon frame broadcasted by base station apparatus come referred to as passive the case where holding base station apparatus
It scans (Passive scanning).On the other hand, by terminal installation by into BBS broadcast probe request frame detect base station
The case where device referred to as active scan (Active scanning).Base station apparatus can send probing response frame and be used as to the spy
The response of claim frame is surveyed, the contents of the probing response frame are identical as beacon frame.
Terminal installation is attached processing after identifying base station apparatus, to the base station apparatus.Connection processing is classified as
Certification (Authentication) process and connection (Association) process.Terminal installation pair wishes the base station apparatus connected
Send authentication frame (certification request).For base station apparatus when receiving authentication frame, can be sent to the terminal installation to this comprising expression
The authentication frame (authentication response) for the conditional code (status code) that terminal installation is authenticated etc..Terminal installation can pass through reading
Recorded conditional code comes whether judgment means itself by the base station apparatus allow certification in the authentication frame.It should be noted that
Base station apparatus and terminal installation can repeatedly exchange authentication frame.
Terminal installation after an authentication process, in order to be attached process to base station apparatus, sends association request frame.Base station
Device determines whether the connection of the terminal installation when receiving association request frame, and sends connection response frame to notify
This message.In addition to recording the conditional code for indicating that processing can be attached in connection response frame, also for identification eventually
Associated identifiers (the AID of end device：Association identifier).Base station apparatus can by send out allow connection
Different AID is set separately to manage multiple terminal installations in terminal installation.
After base station apparatus and terminal installation have carried out connection processing, actual data transmission is carried out.In IEEE802.11
In system, definition has decentralised control mechanism (DCF：Distributed Coordination Function), centralized control mechanism
(PCF：Point Coordination Function) and these extended mechanisms (extension distributed channel access (EDCA：
Enhanced distributed channel access), mixed control feature (HCF：Hybrid coordination
Function) etc.).Hereinafter, being illustrated in case of base station apparatus sends signal by DCF to terminal installation.
In DCF, base station apparatus and terminal installation before a communication, carry out the wireless channel for confirming device own circumference
Behaviour in service carrier sense (CS：Carrier sense).For example, the base station apparatus as cell site is wireless by this
Channel is received than scheduled clear channel assessment (CCA) grade (CCA grades：Clear channel assessment level) it is high
In the case of signal, delay to the transmission of the transmission frame on the wireless channel.Hereinafter, in the wireless channel, will detect
Referred to as busy (Busy) state of state of signal more than CCA grades, the state for the signal for not detecting CCA grades or more is known as
Idle (Idle) state.Thus, by power (receive power grade) of each device based on the signal being an actually-received come into
Capable CS is known as Physical carrier sense (physics CS).It should be noted that CCA grades are also known as carrier sense grade (CS
) or CCA threshold values (CCA threshold level：CCAT).It should be noted that base station apparatus and terminal installation are detecting
In the case of signal more than CCA grades, at least enter the action of the signal of demodulation PHY layer.
Base station apparatus is with according to the frame period (IFS of type：Inter frame space) come to the transmission frame to be sent into
Row carrier sense, and judge that wireless channel is busy condition or idle state.Base station apparatus carries out the period root of carrier sense
According to the frame type and subframe type and difference of the transmission frame that base station apparatus will be sent.In IEEE802.11 systems, definition
There are multiple IFS that the period is different, has：Short frame period (SIFS for the transmission frame for providing highest priority：Short
IFS), for higher poll frame period (the PCF IFS for sending frame of priority ratio：PIFS), the hair minimum for priority
Send decentralised control frame period (the DCF IFS of frame：DIFS) etc..In the case where base station apparatus is by DCF transmission data frames, base
Station arrangement uses DIFS.
After the standby DIFS of base station apparatus, the further standby random back (random for preventing frame conflict
Backoff) the time.In IEEE802.11 systems, using being referred to as competition window (CW：Contention window) with
Machine back off time.In CSMA/CA, with the transmission frame transmitted by some cell site in the interference not from other cell sites
It is received under state premised on the reception of station.Therefore, when having sent transmission frame between cell site with identical timing, occur between frame
Conflict, receiving station can not accurately be received.Therefore, each cell site is before transmission starts, by it is standby set at random when
Between avoid the conflict of frame.When judging that wireless channel is idle state by carrier sense, base station apparatus can start CW's
Countdown, CW become 0 and obtain transmission route for the first time, and frame is sent to terminal installation.It should be noted that in the countdown of CW
In the case that wireless channel is judged as busy condition by middle base station apparatus by carrier sense, stop the countdown of CW.Then, exist
In the case that wireless channel becomes idle state, then before-IFS, base station apparatus restarts the countdown of remaining CW.
Terminal installation as receiving station, which receives, sends frame, reads the PHY headers of the transmission frame, demodulates the transmission received
Frame.Then, terminal installation can by reading the MAC header of signal that demodulate, identify the transmission frame whether with device itself be
Destination.It should be noted that terminal installation can also be based on the information recorded in PHY headers (for example, VHT-SIG-A is remembered
Group identifier (the GID of load：Group identifier, Group ID)) judge the destination of the transmission frame.
Terminal installation, using device itself as destination, then can inerrably demodulate transmission in the transmission frame for judging to receive
In the case of frame, it is necessary to will indicate that the ACK frames that can be accurately received frame are sent to the base station apparatus as cell site.ACK frames
It is one of the transmission frame of highest priority that standby interior (not taking random-backoff time) in the SIFS periods sends.Base station apparatus with
It and receives the ACK frames sent by terminal installation and terminate a series of communication.It should be noted that terminal installation can not be accurate
In the case of ground receiving frame, terminal installation does not send ACK.Therefore certain period (SIFS+ACK of the base station apparatus after frame transmission
Frame length) in do not receive the ACK frames from receiving station in the case of, it is believed that communication failure and terminate to communicate.IEEE802.11 systems
The case where end of the primary communication (also referred to as happening suddenly) of system is in addition to sending the broadcast singals such as beacon frame uses segmentation transmission data
Fragment (fragmentation) the case where etc. except special circumstances, it is necessary to by the way that whether there is or not receive ACK frames to judge.
Terminal installation is reported in the case where the transmission frame for being judged as receiving is not using device itself as destination based on PHY
The length (Length) of the recorded transmission frame carrys out setting network allocation vector (NAV in first-class：Network allocation
vector).Terminal installation is in the period for being set to NAV not tentative communication.That is terminal installation is being set to NAV's
Period carries out judging the identical action of the case where wireless channel is busy condition, therefore leading to based on NAV with by physics CS
Letter control is also referred to as virtual carrier sensing in wireless network communication (virtual CS).NAV other than being set based on the information recorded in PHY headers,
Transmission request (the RTS also imported by order to eliminate hidden terminal problem：Request to send) frame, receive prepare knot
Beam (CTS：Clear to send) frame sets.
Each device carries out carrier sense, relative to the DCF for automatically obtaining transmission route, is referred to as a coordinator in PCF
(PC：Point coordinator) control stand control BSS in each device transmission route.In general, base station apparatus is PC, obtain
The transmission route of terminal installation in BSS.
Include non-competing period (CFP in the communication time period based on PCF：Contention free period) and competition
Period (CP：Contention period).It in CP, is communicated based on DCF above-mentioned, the PC controls transmission in CFP
Power.Base station apparatus as PC broadcasts period (the CFP Max for recording CFP into BSS before the communication of PCF
) etc. duration beacon frame.It should be noted that being used in the transmission for the beacon frame broadcasted when the transmission of PCF starts
PIFS, and sent in the case where being not to wait for CW.When receiving the terminal installation of the beacon frame by CFP recorded in the beacon frame
Section is set as NAV.Later, until NAV passes through or broadcasted into BSS the signal of the end of CFP (for example, comprising CF-end's
Data frame) when being received, the signal of transmission route is only obtained (for example, comprising CF-poll's by the notice that PC is sent receiving
Data frame) in the case of, terminal installation could obtain transmission route.It should be noted that within the CFP periods, in same BSS
Data packet does not clash, therefore each terminal installation does not take the random-backoff time used in DCF.
Wireless medium can be divided into multiple resource units (Resource unit：RU).Fig. 4 is point for indicating wireless medium
Cut an exemplary synoptic diagram of state.For example, in division of resources example 1, wireless communication device can will be as wireless medium
Frequency resource (subcarrier) is divided into nine RU.Similarly, in division of resources example 2, wireless communication device can will be used as wireless
The subcarrier of medium is divided into five RU.Certainly, division of resources example shown in Fig. 4 is only an example, for example, multiple RU also may be used
To be made of respectively different subcarrier numbers.Can not only include frequency resource in addition, in the wireless medium for being divided into RU, moreover it is possible to
Including space resources.Wireless communication device (for example, AP) is different using terminal installation as the frame of destination by being configured in each RU,
Frame can simultaneously be sent to multiple terminal installations (for example, multiple STA).AP can will indicate the information of the cutting state of wireless medium
(Resource allocation information) is recorded in the frame transmitted by device itself as control information is shared
PHY headers.Moreover, AP can will be indicated configured with using each STA as information (the resource unit of the RU of the frame of destination
Assignment information) the PHY headers of the frame transmitted by device itself are recorded in as intrinsic control information.
In addition, multiple terminal installations (for example, multiple STA) by frame by being respectively arranged at assigned RU and transmission, energy
Simultaneously send frame.Multiple STA can have received frame (the Trigger frame for including the triggering information sent from AP：TF) it
Afterwards, after the standby defined period, frame transmission is carried out.Each STA can distribute to dress based on the information recorded in the TF to grasp
Set the RU of itself.In addition, each STA can obtain RU by the random access on the basis of the TF.
Multiple RU can be distributed to a STA by AP simultaneously.Multiple RU can be both made of continuous subcarrier, can also
It is made of discontinuous subcarrier.AP can both send a frame using multiple RU of a STA are allocated in, can also will be more
A frame is respectively allocated to different RU and transmission.At least one of multiple frame can be included and send Resource
The frame of the shared control information of multiple terminal installations of allocation information (resource allocation information).
One STA can distribute multiple RU by AP.STA can send a frame using assigned multiple RU.In addition,
STA can use assigned multiple RU, and multiple frames are respectively allocated to different RU and transmission.Multiple frame can be not respectively
The frame of same frame type.
Multiple AID (Associate ID) can be distributed to a STA by AP.AP can be to distributing to the multiple of STA
AID distributes RU respectively.AP can use assigned RU respectively, and multiple AID to distributing to a STA send different respectively
Frame.The different frame can be different the frame of frame type respectively.
One STA can distribute multiple AID (Associate ID) by AP.One STA can be to assigned multiple AID points
RU is not distributed.One STA can be identified as the RU for being respectively allocated to the assigned multiple AID of device itself to distribute to all devices
The RU of itself, and send a frame using assigned multiple RU.In addition, a STA can use assigned multiple RU,
Send multiple frames.At this point, it is concurrent to record the information that indicates to establish with the RU being respectively allocated associated AID in multiple frame
It send.AP can use assigned RU, multiple AID to distributing to a STA to send different frames respectively respectively.The different frame
It can be different the frame of frame type.
Hereinafter, base station apparatus, terminal installation are also referred to as wireless communication device.In addition, also some wireless communication is filled
It sets the information that the when of being communicated with other wireless communication devices exchanges and is known as data (data).That is wireless communication device packet
Containing base station apparatus and terminal installation.
Wireless communication device has any or both sides in the function of sending PPDU and the function of receiving PPDU.Fig. 1 is table
Show an exemplary figure of the PPDU structures transmitted by wireless communication device.PPDU corresponding with IEEE802.11a/b/g standards
It includes L-STF, L-LTF, L-SIG and Data frame (MAC Frame, mac frame, payload, data portion, data, information bit to be
Deng) composition.PPDU corresponding with IEEE802.11n standards be comprising L-STF, L-LTF, L-SIG, HT-SIG, HT-STF,
The composition of HT-LTF and Data frames.PPDU corresponding with IEEE802.11ac standards be comprising L-STF, L-LTF, L-SIG,
Some or all compositions of VHT-SIG-A, VHT-STF, VHT-LTF, VHT-SIG-B and mac frame.With
The PPDU of IEEE802.11ax research on standard be comprising L-STF, L-LTF, L-SIG, L-SIG in time repeat RL-SIG,
Some or all compositions of HE-SIG-A, HE-STF, HE-LTF, HE-SIG-B and Data frame.
L-STF, L-LTF and the L-SIG surrounded by the dotted line in Fig. 1 is the structure being used in conjunction in IEEE802.11 standards
At (hereinafter, L-STF, L-LTF and L-SIG are also referred to as L- headers).That is such as being marked with IEEE 802.11a/b/g
Accurate corresponding wireless communication device can suitably receive the L- headers in PPDU corresponding with IEEE802.11n/ac standards.With
PPDU corresponding with IEEE802.11n/ac standards can be considered as by the corresponding wireless communication device of IEEE 802.11a/b/g standards
PPDU corresponding with IEEE 802.11a/b/g standards is received.
But, wireless communication device corresponding with IEEE 802.11a/b/g standards is after L- headers, can not demodulate with
The corresponding PPDU of IEEE802.11n/ac standards, therefore can not demodulate and be used to send address (TA：Transmitter
Address address (RA), is received：Receiver Address), the relevant information of Duration/ID fields of the setting of NAV.
As for wireless communication device corresponding with IEEE 802.11a/b/g standards suitably set NAV (or into
Period reception action as defined in row) method, IEEE802.11 provide the method for Duration information insertion L-SIG.With L-
The relevant information of transmission speed (RATE field, L-RATE field, L-RATE, L_DATARATE, L_ in SIG
DATARATE field) and transmission period relevant information (LENGTH field, L_LENGTH field, L_LENGTH) use
NAV is suitably set in wireless communication device corresponding with IEEE 802.11a/b/g standards.
Fig. 2 is an exemplary figure of the method for the Duration information for indicating to be inserted into L-SIG.In fig. 2, as one
A example shows PPDU structures corresponding with IEEE802.11ac standards, but PPDU structures are not limited to this.Can also be with
The corresponding PPDU structures of IEEE802.11n standards and PPDU structures corresponding with IEEE802.11ax standards.TXTIME has
With the relevant information of length of PPDU, aPreambleLength (preamble length) has and the length of leading (L-STF+L-LTF)
Relevant information is spent, aPLCPHeaderLength (PIC header lengths) has relevant with the length of PLCP headers (L-SIG)
Information.Following formula (1) is an exemplary formula of the computational methods for indicating L_LENGTH.
[formula 1]
Here, Signal Extension (signal extension) be, for example, in order to obtain the compatibility of IEEE802.11 standards and
The virtual time slot of setting, Nops indicate the information with L_RATE connections.ASymbolLength be with a symbol (symbol,
OFDM symbol etc.) period relevant information, aPLCPServiceLength indicate PLCP Service field included
Digit, aPLCPConvolutionalTailLength (convolution tail length) indicate convolution symbol tail digit.Wireless communication dress
Set for example can calculate L_LENGTH using formula (1), and be inserted into L-SIG.It should be noted that the computational methods of L_LENGTH
It is not limited to formula (1).For example, L_LENGTH can also be calculated by following formula (2).
[formula 2]
In the case where wireless communication device sends PPDU by L-SIG TXOP Protection, pass through following formula
(3) or following formula (4) carries out the calculating of L_LENGTH.
[formula 3]
[formula 4]
Here, L-SIG Duration indicate to have added up to for example comprising by formula with period relevant information, the period
(3) or the PPDU of formula (4) calculated L_LENGTH is sent out as its response by the wireless communication device of destination with expectation
The period of the Ack and SIFS that send.Wireless communication device calculates L-SIG by following formula (5) or following formula (6)
Duration。
[formula 5]
L-SIGDuration=(Tinit_PPDU-(aPreambleLength+aPLCPHeaderLength))+SIFS+
TRes-PPDU…(5)
[formula 6]
L-SIGDuration=(TMACDur-SIFS- (aPreambleLength+aPLCPHeaderLength)) ...
(6)
Here, Tinit_PPDU indicates relevant with the period comprising the PPDU by formula (5) calculated L_LENGTH
Information, when TRes_PPDU expressions are with to the PPDU for the response expected comprising the PPDU by formula (5) calculated L_LENGTH
The relevant information of section.In addition, TMACDur indicate with comprising by formula (6) calculated L_LENGTH, mac frame in PPDU
Including Duration/ID field value connection information.It is Initiator (initiator, transmission in wireless communication device
Person, Xian Daozhe, transmitter) in the case of, L_LENGTH is calculated using formula (5), is Responder in wireless communication device
In the case of (corresponding person, recipient, receiving terminal), L_LENGTH is calculated using formula (6).
Fig. 3 is the exemplary figure for indicating L-SIG Duration in L-SIG TXOP Protection.DATA
(frame, payload, data etc.) are made of the part or both sides of mac frame and PLCP headers.In addition, BA be Block Ack or
Ack.PPDU can include L-STF, L-LTF, L-SIG, can also include any or arbitrary in DATA, BA, RTS or CTS
It is multiple and constitute.In an example shown in Fig. 3, the L-SIG TXOP Protection for having used RTS/CTS are indicated, but
CTS-to-Self can also be used.Here, MAC Duration are the periods indicated by the value of Duration/ID field.This
Outside, Initiator can send CF_End frames to notify the end of L-SIG TXOP Protection periods.
Then, the method for identifying BSS to the frame received according to wireless communication device illustrates.Wireless communication device is
BSS is identified according to the frame of reception, preferably sends the wireless communication device of PPDU by the information (BSS of BSS for identification
Color, BSS identification information, BSS intrinsic value) it is inserted into the PPDU.Indicate that the information of BSS color can be recorded in HE-SIG-
A。
Wireless communication device can repeatedly send L-SIG (L-SIG Repetition).For example, the wireless communication dress of receiving side
It sets by using MRC (Maximum Ratio Combining：Maximal ratio combiner) receive the L-SIG repeatedly sent, it improves
The demodulation accuracy of L-SIG.Moreover, wireless communication device is by MRC in the case where being accurately received L-SIG, including should
The PPDU of L-SIG can be construed to PPDU corresponding with IEEE802.11ax standards.
Wireless communication device can also be carried out in the reception action of PPDU PPDU other than the PPDU a part (for example,
Leading as defined in IEEE802.11, L-STF, L-LTF, PLCP header etc.) reception action (also referred to as double reception action).
In the case that wireless communication device detects a part of PPDU other than the PPDU in the reception of PPDU action, can update and
Part or all of destination-address, transmission source address, PPDU DATA periods relevant information.
Ack and BA can also be referred to as responding (response frame).Furthermore, it is possible to which probe response, authentication response, connection are rung
It should be known as response.
[1. first embodiment]
Fig. 5 is an exemplary figure of the wireless communication system for indicating present embodiment.Wireless communication system 3-1 has nothing
Line communication device 1-1 and wireless communication device 2-1~4.It should be noted that wireless communication device 1-1 is also known as base station
Wireless communication device 2-1~4 are known as terminal installation 2-1~4 by device 1-1.In addition, by wireless communication device 2-1~4 and
Terminal installation 2-1~4 are as the device being connect with wireless communication device 1-1, also referred to as wireless communication device 2A and terminal dress
Set 2A.Wireless communication device 1-1 and wireless communication device 2A are wirelessly connected, in can mutually carry out the transmission of PPDU/connect
The state of receipts.In addition, the wireless communication system of present embodiment other than having wireless communication system 3-1, is also equipped with wirelessly
Communication system 3-2.Wireless communication system 3-2 has wireless communication device 1-2 and wireless communication device 2-5~8.It needs to illustrate
, wireless communication device 1-2 is also known as base station apparatus 1-2, by wireless communication device 2-5~8 be known as terminal installation 2-5~
8.In addition, by wireless communication device 2-5~8 and terminal installation 2-5~8 as the device being connect with wireless communication device 1-2,
Also referred to as wireless communication device 2B and terminal installation 2B.Wireless communication system 3-1 and wireless communication system 3-2 forms different
BSS, but this is not necessarily mean that ESS (Extended Service Set：Extended service set) it is different.ESS indicates to form LAN
(Local Area Network：LAN) services set.That is belonging to the wireless communication device of identical ESS can regard
To belong to identical network from upper layer.It should be noted that wireless communication system 3-1 and 3-2 can also have it is multiple wireless
Communication device.
In Figure 5, in the following description, the signal transmitted by wireless communication device 2A reaches wireless base station apparatus 1-1
And wireless communication device 2BA, on the other hand wireless communication device 1-2 is not reached.That is when wireless communication device 2A is used
When some channel sends signal, which is judged as busy condition by wireless communication device 1-1 and wireless communication device 2B, another
The channel is judged as idle state by aspect wireless communication device 1-2.In addition, the signal transmitted by wireless communication device 2B reaches
On the other hand wireless base station apparatus 1-2 and wireless communication device 2A does not reach wireless communication device 1-1.That is when wireless
When communication device 2B sends signal using some channel, wireless communication device 1-2 and wireless communication device 2A judge the channel
For busy condition, and the channel is judged as idle state by wireless communication device 1-1.
Fig. 6 is the dress for indicating wireless communication device 1-1,1-2,2A and 2B (hereinafter, also referred to collectively as wireless device 10-1)
Set an exemplary figure of composition.Wireless communication device 10-1 includes upper layer part (upper layer processing step) 10001-1, autonomous distribution
Control unit (autonomous distributed controll step) 10002-1, sending part (forwarding step) 10003-1, receiving part (receiving step)
10004-1 and antenna part 10005-1 and constitute.
Upper layer part 10001-1 and can will be notified with the relevant information of business to autonomous distributed controll with other network connections
Portion 10002-1.With the relevant information of business refer to for example either using other wireless communication devices as the information of destination,
The control information of management frame, control frame can be contained within.
Fig. 7 is the exemplary figure for indicating the device of autonomous distributed controll portion 10002-1 and constituting.Autonomous distributed controll portion
10002-1 includes that the portions CCA (CCA steps) 10002a-1, backoff portion (keeping out of the way step) 10002b-1 and transmission judging part (are sent
Judgment step) 10002c-1 and constitute.
The portions CCA 10002a-1 can use received signal power that is being notified by receiving part and being received via radio resource
Relevant information and with receive any or both sides in the relevant information of signal (include decoded information), carry out the wireless money
The condition adjudgement (judgement for including busy or idle) in source.The portions CCA 10002a-1 can be by the condition adjudgement information of the radio resource
It notifies to backoff portion 10002b-1 and sends judging part 10002c-1.
Backoff portion 10002b-1 can be kept out of the way using the condition adjudgement information of radio resource.Backoff portion 10002b-1 lifes
At CW, there is countdown function.For example, in the case of the condition adjudgement presentation of information idle of radio resource, it can execute CW's
Countdown can stop the countdown of CW in the case of the condition adjudgement presentation of information busy of radio resource.Backoff portion
10002b-1 can notify the value of CW to give transmission judging part 10002c-1.
It sends judging part 10002c-1 and uses any or both sides in the condition adjudgement information of radio resource or the value of CW
To carry out transmission judgement.For example, in the condition adjudgement presentation of information idle of radio resource, and when the value of CW is 0, transmission can be sentenced
Disconnected information notifies to give sending part 10003-1.In addition, in the case of the condition adjudgement presentation of information idle of radio resource, can incite somebody to action
Transmission judges that information notifies to give sending part 10003-1.
Sending part 10003-1 is comprising physical layer frame generating unit (physical layer frame generation step) 10003a-1 and wireless transmission
The composition of portion (wireless transmission step) 10003b-1.Physical layer frame generating unit 10003a-1, which has, to be based on from transmission judging part
The transmission of 10002c-1 notices judges information to generate the function of physical layer frame (PPDU).10003a-1 pairs of physical layer frame generating unit
The transmission frame sent from upper layer implements Error Correction of Coding, modulation, precoding filtering multiplication etc..Physical layer frame generating unit 10003a-1 will
The physical layer frame of generation notifies to give wireless transmission part 10003b-1.
Include control information in the frame that physical layer frame generating unit 10003a-1 is generated.Include to indicate with each in the control information
Wireless communication device is the data configuration of destination in which RU (here, including frequency resource and space resources both sides in RU)
Information.In addition, the frame generated in physical layer frame generating unit 10003a-1 includes the wireless communication device to terminal as a purpose
Indicate the trigger frame that frame is sent.It is used when the trigger frame includes to indicate that the wireless communication device for indicating frame transmission sends frame
RU information.
Wireless transmission part 11003b-1 is converted to the physical layer frame generating unit 11003a-1 physical layer frames generated wirelessly
Frequency band (RF：Radio Frequency) signal, and generate wireless frequency signal.In wireless transmission part, 11003b-1 is carried out
Comprising digital-to-analog conversion, filtering, from base band to frequency conversion of RF bands etc. in processing.
Receiving part 10004-1 is comprising wireless receiving section (wireless receiving step) 10004a-1 and signal demodulation section (signal
Demodulation step) 10004b-1 composition.Receiving part 10004-1 is generated according to the signal of the antenna part 10005-1 RF bands received
With the relevant information of received signal power.Receiving part 10004-1 can will believe with the relevant information of received signal power and with receiving
Number relevant information notifies to give the portions CCA 10002a-1.
Wireless receiving section 11004a-1 has is converted to baseband signal by the signal for the RF bands that antenna part 10005-1 is received,
And generate the function of physical layer signal (for example, physical layer frame).In the processing that wireless receiving section 11004a-1 is carried out, including from
RF bands are to the frequency conversion process of base band, filtering, analog/digital conversion.
Signal demodulation section 11004b-1 has the function of demodulating the physical layer signal that wireless receiving section 11004a-1 is generated.
Include channel equalization, demapping, Error Correction of Coding etc. in the processing that signal demodulation section 10004b-1 is carried out.Signal demodulation section
10004b-1 can be taken out according to physical layer signal the information that such as physical layer header information, the MAC header that be included is included with
And send the information that frame is included.Signal demodulation section 10004b-1 can notify the information taken out to give upper layer part 10001-1.It needs
It is noted that signal demodulation section 10004b-1 can take out the information that information, the MAC header that physical layer header is included are included
And it sends any or whole in the information that frame is included.
Antenna part 10005-1 has the wireless frequency signal for generating wireless transmission part 10003b-1 to wireless device 0-1
It is sent to the function of wireless space.In addition, antenna part 10005-1 has the wireless frequency letter for receiving and being sent from wireless device 0-1
Number function.
Wireless communication device 10-1 can be recorded in the PHY headers of the frame of transmission, MAC header and indicate that device itself utilizes nothing
Thus the information of the period of line medium sets NAV in the period to the wireless communication device of device own circumference.For example, wireless
Communication device 10-1 can by indicate the information of the period be recorded in transmission frame Duration/ID fields or Length fields.
The NAV periods set to the wireless communication device of device own circumference are known as the transmission opportunity that wireless communication device 10-1 is obtained
Period (or being only called transmission opportunity).Also, the wireless communication device 10-1 for obtaining the transmission opportunity is known as conveyer
It can winner (TXOP holder, transmission opportunity holder).Wireless communication device 10-1 sends to obtain transmission opportunity
The frame type of frame is not by any restriction, either control frame (for example, RTS frames, CTS-to-self frames), can also be number
According to frame.
As transmission opportunity holder wireless communication device 10-1 can during the transmission opportunity to device itself other than
Wireless communication device send frame.In the case where wireless communication device 1-1 is transmission opportunity holder, wireless communication device 1-
1 can send frame within the period of the transmission opportunity to wireless communication device 2A.In addition, wireless communication device 1-1 can be in the transmission
Wireless communication device 2A instructions are sent by the frame of destination of wireless communication device 1-1 in the chance period.Wireless communication device
1-1 can send comprising instruction using wireless communication device 1-1 as destination wireless communication device 2A within the transmission opportunity period
Frame send information trigger frame.
Wireless communication device 1-1 both can be to that may carry out all communication band domains of frame transmission (for example, Operation
bandwidth：Bandwidth of operation) ensure transmission opportunity, the communication band domain that frame can also be sent to practical (for example,
Transmission bandwidth：Transmission bandwidth) etc. specific communication band domain (Band) ensured.
The wireless communication device of the instruction of frame transmission is carried out within the period for the transmission opportunity that wireless communication device 1-1 is obtained
It is not necessarily limited to the wireless communication device being connect with device itself.For example, wireless communication device is in order to being located at device itself
The wireless communication device on periphery send the control frames such as management frames, the RTS/CTS frames such as Reassociation (again be associated with) frame,
The transmission of frame can also be indicated the wireless communication device not connect with device itself.
Fig. 8 is indicate Frame switch between the wireless communication device 1-1 of present embodiment and wireless communication device 2-1 one
A exemplary figure.In fig. 8, the signal for being recorded as Preamble (leading) indicates the PHY headers for including STF, LTF and SIG.
First, wireless communication device 1-1 can describe (transmission opportunity period transmission opportunity period of device itself acquisition by sending
802) frame (frame 801), obtains the transmission opportunity.It should be noted that in this description will be omitted, but wireless communication device 1-1 energy
Frame 801 is sent based on the transmission process of CSMA/CA.At this point, wireless communication device 1-1 can change CCA etc. when sending frame 801
Grade, minimum receiving sensitivity.In addition, wireless communication device 1-1, when sending frame 801, energy is according to the conveyer obtained by frame 801
The period of meeting, conveying sends the number etc. of the wireless communication device 2A of instruction in transmission opportunity, to change CCA grades, minimum
Receiving sensitivity.For example, wireless communication device 1-1 can the transmission opportunity obtained by frame 801 period it is shorter than defined value
In the case of, keep the case where CCA grades are than sending other frames high.
The wireless communication device 2-1 of frame 801 is had received based on the information recorded in frame 801, in the transmission opportunity period 802
Set NAV.Later, wireless communication device 2-1 is in the transmission opportunity period 802, the case where being indicated by wireless communication device 1-1 with
Outside, it is sent without frame.Wireless communication device 2-1 will can be indicated whether to receive the setting of the NAV based on frame 801 in advance and is
No functional information (the Capability that can send the frame based on the trigger frame sent from wireless communication device 1-1
Information) notice gives wireless communication device 1-1.Wireless communication device 2-1 can be in the connection to wireless communication device 1-1
In process (verification process), the functional information is notified.It should be noted that in fig. 8, the period of transmission opportunity and NAV are remembered
Carry as since the leading end of frame, but at the beginning of the transmission opportunity of present embodiment and NAV section definition not necessarily
It is limited to definition shown in Fig. 8, for example, can both be set from the starting point of frame, it can also be from the end setup of frame.
It should be noted that wireless communication device 2-1 can also persistently be carried out receiving dynamic within the transmission opportunity period 802
Make.Wireless communication device 1-1 can will be indicated whether in the transmission opportunity obtained by frame 801 to specific wireless communication device into
The information that row frame is sent is recorded in frame 801.Wireless communication device 1-1 can in the transmission opportunity obtained by frame 801, will expression be
It is no that specific wireless communication device is indicated to be recorded in frame by the information of the transmission of the frame of destination of wireless communication device 1-1
801。
Wireless communication device 2-1 can be received in the transmission opportunity from the wireless communication device as transmission opportunity holder
The frame that 1-1 is sent.Wireless communication device 2-1 can be in the transmission opportunity from the wireless communication device as transmission opportunity holder
The frame that 1-1 is sent includes the case where instruction is using wireless communication device 1-1 as the information of the transmission of the frame of destination in device itself
Under, it sends using wireless communication device 1-1 as the frame (frame 804) of destination.
Wireless communication device 1-1 also claims the frame of the information sent comprising instruction frame relative to other wireless communication devices
For trigger frame (Trigger frame).As shown in figure 8, trigger frame can simultaneously be sent with the frame for obtaining transmission opportunity.Here,
Simultaneously send refers to the both sides recorded included in frame 801 with the relevant information of transmission opportunity and with the relevant information of trigger frame
Information the case where.In addition, record is omitted in Fig. 8, but trigger frame also can with using wireless communication device 2-1 as the number of destination
It is simultaneously sent according to frame.
The information of the RU of configuration data when trigger frame can include to indicate that wireless communication device 2-1 sends frame.
It should be noted that wireless communication device 2-1 can be slaves to the nothing of other BSS judging the trigger frame received
In the case of the frame that line communication device is sent, the frame is abandoned.
Wireless communication device 2-1 is in the transmission opportunity according to the instruction from transmission opportunity holder of the transmission opportunity
In the case of sending frame, frame can be sent after sending stand-by time (IFS) by defined frame.For example, wireless communication dress
Frame can be sent after by the SIFS times by setting 2-1.Wireless communication device 2-1 can also be in the defined frame stand-by time not
Carry out carrier sense.
Wireless communication device 2-1 can be recorded in the Duration/ID fields or Length fields of frame 804 until transmission opportunity
The remaining period (NAV periods 805, Remaining duration) until 802 end.The channel radio of the reception failure of frame 801
T unit can set NAV, therefore can make this by receiving the frame 804 in the remaining time until transmission opportunity 802 terminates
The probability of frame conflict in transmission opportunity declines.Wireless communication device 2-1 can be recorded in frame 804 by wireless communication device 1-1
The information of Duration/ID fields or Length fields is recorded in frame 801.
Wireless communication device 1-1 as transmission opportunity holder can terminate halfway and (abandon) transmission opportunity obtained.
Wireless communication device 1-1 can send the frame (frame 806) for the transmission opportunity for indicating to abandon obtaining.Frame 806 for example can be CF-End
Frame.The wireless communication device 2-1 for having received CF-End frames can be when CF-End frames receive, the NAV of reset apparatus setting themselves.
It should be noted that the frame sent when obtaining transmission opportunity 802 in wireless communication device 1-1 with from other BSS
In the case that the frame of transmission clashes, wireless communication device 1-1 can not obtain transmission opportunity 802.This means that as passing
The send opportunity of the scheduled wireless communication device of the transmission of instruction frame is also abandoned in defeated chance 802.Therefore, present embodiment
Wireless communication device 1-1 for the frame that sends when obtaining transmission opportunity 802, can use than common frame transmission stand-by time
(for example, DIFS) short frame sends stand-by time (for example, PIFS).In addition, the wireless communication device 1-1 of present embodiment is directed to
The frame sent when transmission opportunity 802 is obtained, the frame can be sent and handled without random back.In addition, the nothing of present embodiment
Line communication device 1-1 can recognize that it is to belong to higher than the priority of other frames for the frame sent when obtaining transmission opportunity 802
Access category frame, and implement CCA.
Fig. 9 is indicate Frame switch between the wireless communication device 1-1 of present embodiment and wireless communication device 2A one
A exemplary figure.Wireless communication device 1-1 can obtain transmission opportunity 902 by sending frame 901, and hold as transmission opportunity
Person.In addition, according to the example of Fig. 9, wireless communication device 1-1 includes to indicate to be directed to wireless communication device 2-1 and nothing in frame 901
The information (being recorded as TF in fig.9) of the trigger frame of line communication device 2-2 and using wireless communication device 2-3 as the data of destination
Frame.
Wireless communication device 2-1~4 are in the case where having received frame 901, in the slot setup that transmission opportunity 902 indicates
NAV。
The trigger frame for being included by frame 901 indicates the wireless communication device 2-1 and wireless communication device of frame transmission
2-2 uses the RU indicated by frame 901, sends using wireless communication device 1-1 as the frame (frame 904-1 and frame 904-2) of destination.
Can the wireless communication device 2-3 that the data frame that frame 901 is included be had received indicate receive this to wireless communication device 1-1 transmissions
The block ACK frames or ACK frames (being shown as BACK in fig.9) (frame 904-3) of data frame.
It is waited for by the transmission of defined frame after the frame 901 that wireless communication device 1-1 is sent having received frame 904-1~3
After the machine time, device 2-1~3 is sent by radio communication.At this point, passing through OFDMA transmission and MU-MIMO in frame 904-1~3
In the case that transmission is sent, the quantity of leading the had LTF of frame 904-1~3 needs to be equal quantity.
Orthogonality between the LTF that wireless communication device 2-1~3 is sent is by using the orthogonal expansion to frequency direction
In the case that the diffusion (or scrambling) of scattered symbol (for example, Walsh symbols, OVSF symbols) ensures, the quantity of LTF can be integrated
Maximum fluxion in the spatial stream number sent for each wireless communication device.For example, the spatial flow sent in wireless communication device 2-1
Number is four, in the case that the spatial stream number transmitted by wireless communication device 2-2 and 2-3 is one, each wireless communication device
2-1~3 can send LTF in time orientation by 4 OFDM symbols.At this point, wireless communication system 2-2 and 2-3 can be used
Any row in 4 × 4 orthogonal matrix that wireless communication device 2-1 is used when time orientation sends LTF by 4 OFDM symbols
Recorded sequence (for example, sequence of the first row) makes LTF be spread in time orientation.It should be noted that in each wireless communication
Device 2-1~3 can be pre-allocated in the orthogonal symbols sequence used when frequency direction scrambling LTF.Wireless communication device 1-1 can lead to
Trigger frame is crossed to notify the distribution of the orthogonal symbols sequence to each wireless communication device 2-1~3.In addition, the orthogonal symbols sequence
Distribution enable wireless communication device 1-1 and indicate notice to each wireless communication device 2-1~3 RU distribution information establish
Association.For example, wireless communication device 1-1 will indicate that the information of distribution of the notice to the RU of each wireless communication device 2-1~3 is distinguished
The field being recorded in successively in the trigger frame that wireless communication device 1-1 is sent, therefore wireless communication device 1-1 and wireless communication
Device 2-1~3 can be such that the sequence foundation for recording the sequence and scheduled orthogonal symbols sequence of the distribution information of RU in the field closes
Connection.
In addition, the total sky for the frame that wireless communication device 2-1~3 can be sent based on the trigger frame for being included according to frame 901
Between multiplex number, determine the frame LTF numbers sent.For example, the spatial stream number sent in wireless communication device 2-1 is 4, wirelessly
In the case that the spatial stream number that communication device 2-2 and 2-3 is sent is one, the frame that wireless communication device 2-1~3 is sent by
In the case that all spatial multiplexings (MU-MIMO) send, each wireless communication device 2-1~3 can multiplex gross space
Number is set as 6, and sends LTF 6 by 6 OFDM symbols in time orientation.Each wireless communication device 2-1~3 for LTF when
Between the orthogonal symbols sequence that spreads can also be notified by the trigger frame that wireless communication device 1-1 is sent, with before shown in situation
It is identical, it can be notified to each wireless communication device 2-1 with wireless communication device 1-1 is indicated with the relevant information of orthogonal symbols sequence
The information of the distribution of~3 RU establishes association.
Wireless communication device 2-1~3 can will indicate the remaining period (Remaining Duration) of transmission opportunity 902
Information is recorded in frame 904-1~3 of device itself transmission.When indicating the residue of the transmission opportunity 902 recorded in frame 904-1~3
The information of section can be shared respectively.Indicate that the information of the remaining period of the transmission opportunity 902 recorded in frame 904-1~3 can pass through note
It is loaded in frame 901, is indicated by wireless communication device 1-1.
Wireless communication device 2-1~3 can respectively send frame 904-1~3 after defined frame stand-by time.
The wireless communication device 1-1 for having received frame 904-1~3 can further carry out device certainly during transmission opportunity 902
The instruction that the frame of body sends and sent to the frame of other wireless communication devices.According to the example of Fig. 9, wireless communication device 1-1 energy
By sending frame 907, wireless communication device 2-1 and wireless communication device 2-2 is sent indicate can receiving frame 904-1 and
The block ACK frames of frame 904-2.In addition, wireless communication device 1-1 can refer to wireless communication device 2-4 transmissions by sending frame 907
Show using wireless communication device 1-1 as the trigger frame of the transmission of the frame of destination.
It should be noted that wireless communication device 1-1 can remember in the Duration/ID fields or Length fields of frame 907
Carry the information of the remaining period of the transmission opportunity 902 for the sending time point for indicating frame 907.When indicating the residue of transmission opportunity 902
The value of section can be the period of transmission opportunity recorded in frame 901 divided by be passed through until wireless communication device 1-1 sends frame 907
The value of period.
By frame 907, have sent trigger frame wireless communication device 2-4 can based on the RU indicated by frame 907, come send with
Wireless communication device 1-1 is the frame (frame 909) of destination.In addition, the wireless communication device 1-1 for having received frame 909 can be to wireless
Can communication device 2-4 transmissions receive the block ACK frames using device itself as the frame of destination comprising the expression that frame 909 is included
Frame (frame 911).It should be noted that wireless communication device 1-1 and wireless communication device 2-4 can be in the frame sent respectively, it will
Indicate the information of the remaining period of the transmission opportunity 902 of the sending time point of the frame be recorded in Duration/ID fields or
Length fields.
It should be noted that the wireless communication device 1-1 as transmission opportunity holder can also be obtained in device itself
Transmission opportunity in send frame in the case of, make the value and table of the Duration/ID fields or Length fields recorded in the frame
Show that the information of the remaining period of the transmission opportunity is inconsistent.Duration/ID fields recorded in the frame or Length fields
Value it is shorter than the remaining period of the transmission opportunity in the case of, wireless communication device 1-1 can defined frame send stand-by time
The frame is sent later and without carrier sense.The value ratio of Duration/ID fields or Length fields recorded in the frame
In the case that remaining period of the transmission opportunity is big, wireless communication device 1-1 regains transmission opportunity, therefore can have sent
After the frame of the transmission opportunity is abandoned in expression, the transmission process based on common CSMA/CA sends the frame for obtaining transmission opportunity.
Wireless communication device 1-1 can send the frame (frame 913) for indicating to abandon transmission opportunity 902.Wireless communication device 1-1 energy
The frame comprising CF-End frames is sent as frame 913.It should be noted that wireless communication device 1-1 can using destination-address as
Broadcast address sends CF-End frames.It should be noted that wireless communication device 1-1 can be transmitted by OFDMA, individually send
CF-End frames.In this case, wireless communication device 1-1 is not necessarily to all channel radios in the BSS belonging to device itself
T unit 2A sends CF-End frames.
It should be noted that can not the wireless communication device None- identified wireless communication device 1-1 of receiving frame 913 abandon
Transmission opportunity 902.Therefore, the wireless communication device 2A for having received frame 913 can be after the reception of CF-End frames to indicating CF-End frames
The frame 915 (in fig.9, being recorded as CF-End ACK frames) sent by wireless communication device 1-1 is sent.Expression is abandoned transmitting
The frame of chance 902 can make the wireless communication device for having received the frame for indicating to be sent by transmission opportunity holder reset NAV.
It should be noted that at the time point for sending frame 913, transmission opportunity 902, therefore wireless communication device 2A are abandoned
Frame 915 can be sent based on the transmission process of common CSMA/CA.
It should be noted that wireless communication device 1-1 needs to obtain transmission opportunity again after the transmission of CF-End frames
Frame 901 is sent based on the transmission process of common CSMA/CA.At this point, wireless communication device 1-1, which can ignore, is subordinated to BSS certainly
It is that the wireless communication device of body is sent, indicate frame that CF-End frames are sent by wireless communication device 1-1 and persistently carry out carrier wave and detect
It listens.
The frame (being frame 901 by taking Fig. 9 as an example) that wireless communication device 1-1 is sent when by obtaining transmission opportunity can not obtain
In the case of obtaining the data frame that any multiple wireless communication devices by having sent trigger frame are sent, the transmission opportunity can be judged
Failed, concurrently veer away and abandon the frame of the transmission opportunity.
It is the wireless communication that starting point has received the frame for recording Duration/ID fields and Length fields with frame 901
Device sets NAV within the remaining period of transmission opportunity, but expression abandons the wireless of the reception failure of the frame of the transmission opportunity
Communication device can not reset the NAV.Therefore, the wireless communication device of present embodiment records Duration/ID having received
Not the case where frame that the BSS belonging to the frame is sent is not received in period as defined in after the frame of field and Length fields
Under, it can judge to abandon the transmission opportunity, and the NAV can not be reset.Here, the defined period is not by any restriction, example
As can by with as defined in IEEE802.11 standards frame send stand-by time (SIFS, DIFS, PIFS, AIFS) integral multiple or
Real number defines again.
It should be noted that having received the frame 901 sent from the wireless communication device 1-1 as transmission opportunity holder
Wireless communication device 2A can be sent based on the trigger frame sent from wireless communication device 1-1 using wireless communication device 1-1 as mesh
Ground frame.But, wireless communication device 2A under the defined conditions, both can not send trigger frame from wireless communication device 1-1,
Also it can not send using wireless communication device 1-1 as the frame of destination.As the defined condition, for example, wireless communication device 2A
Before receiving frame 901 or in the case of the reception failure of frame 901, the nothing by belonging to other BSS (Inter BSS) is being received
RTS frames that line communication device is sent, CTS frames either data frame and based on recorded in the RTS frames, the CTS frames or data frame
In the case of information setting NAV, the trigger frame sent from wireless communication device 1-1 both can not have been received within the period of the NAV,
Also it can not send using wireless communication device 1-1 as the frame of destination.
Wireless communication device, communication means and communication system from the description above, obtain the wireless of transmission opportunity
Communication device can suitably carry out multiple wireless communication devices in the transmission opportunity transmission instruction of frame, therefore energy will be wireless
Communication device efficiently accesses wireless medium.
[common ground of 2. all embodiments]
It is to realize the scheme of the present invention in the program of the wireless communication device action of the scheme of the present invention
The mode of the function of the above embodiment, the program (program for making computer function) of control CPU etc..Also, by these
The information of device processing is temporarily stored in RAM when carrying out its processing, later, is stored in various ROM, HDD, and lead to as needed
CPU is crossed to be read out, correct, be written.As storage program recording medium, can be semiconductor medium (for example, ROM, it is non-easily
The property lost storage card etc.), optical recording medium (for example, DVD, MO, MD, CD, BD etc.), magnetic recording media (for example, tape, floppy disk etc.)
Any one of Deng.In addition, the program by executing load, can not only realize the function of the above embodiment, but also sometimes
It can jointly be handled by instruction based on the program and operating system or other applications etc., realize of the invention one
The function of a scheme.
In addition, in the case where circulating in market, program storage can be made to its circulation in removable recording medium, or
It is transmitted to the server computer connected via networks such as internets.In this case, the storage device of server computer
Also it is contained in the scheme of the present invention.In addition it is also possible to by wireless communication device 1-1 in above-mentioned embodiment, wireless
Part or all of communication device 2-1, wireless communication device 1-2, wireless communication device 2-2 are as typical aggregation circuit
LSI is realized.Wireless communication device 1-1, wireless communication device 2-1, wireless communication device 1-2, wireless communication device 2-2 it is each
Functional block both can individually chip, part or all can also be integrated and carry out chip.By each functional block integrated circuit
In the case of change, it is attached with and controls their integrated circuit control unit.
In addition, the method for integrated circuit is not limited to LSI, it can also be by special circuit or general processor come real
It is existing.In addition, in the case where there is the technology instead of the integrated circuit of LSI by the progress of semiconductor technology, can also make
With the integrated circuit based on the technology.
It should be noted that the present application is not limited to above-mentioned embodiment.The wireless communication of the present application
Device is not limited to the application to mobile station apparatus, naturally it is also possible to applied to being set to the fixed or non-movable of indoor and outdoor
Formula electronic equipment, for example, AV equipment, cooking apparatus, cleaning/washing facility, air-conditioning equipment, office equipment, Vending Machine, its
His lifestyle device etc..
More than, embodiments of the present invention are explained in detail with reference to the accompanying drawings, but specific constitute is not limited to this implementation
Mode, the design etc. for not departing from the range of the purport of the present invention are also contained in claims.
Industrial utilizability
The present invention is suitable for wireless communication device, communication means and communication system.
It should be noted that the Japanese patent application 2016- that this international application was filed an application based on January 8th, 2016
No. 002357 CLAIM OF PRIORITY, and the full content of Japanese patent application the 2016-002357th is incorporated in this international application.
Symbol description
1-1,1-2,2-1~8,2A, 2B wireless communication device
3-1,3-2 range of management
10001-1 upper layer parts
The autonomous distributed controll portions 10002-1
The portions 10002a-1 CCA
10002b-1 backoff portion
10002c-1 sends judging part
10003-1 sending parts
10003a-1 physical layer frame generating units
The wireless transmission parts 10003b-1
10004-1 receiving parts
10004a-1 wireless receiving section
10004b-1 signal demodulation sections
10005-1 antenna parts
Claims (10)
1. a kind of wireless communication device can be communicated with multiple terminal installations, be had：Sending part sends and obtains transmission opportunity
First frame, in the transmission opportunity, will instruction using device itself as the transmission of the second frame of destination trigger frame send
At least one of to the multiple terminal installation, in the transmission opportunity, send by the multiple terminal installation extremely
A few third frame as a purpose,
Value recorded in second frame, indicating the transmission opportunity that the third frame is obtained, recorded in the first frame
, value that indicate transmission opportunity divided by when indicating to terminate passed through to second frame traffic since being sent the first frame
Value obtained by the value of section is different.
2. wireless communication device according to claim 1, wherein
The value for the transmission opportunity that the expression third frame of the sending part recorded in the third frame is obtained, than described the
The value divided by the expression first frame of expression transmission opportunity recorded in one frame, which are sent, to be started to terminate institute to second frame traffic
In the case that value obtained by the value of the period of process is small, the sending part sends the third frame without implementing carrier sense.
3. wireless communication device according to claim 1, wherein
The sending part is in the information that the trigger frame includes the transmission opportunity for indicating that second frame is obtained.
4. wireless communication device according to claim 3, wherein
The length for the transmission opportunity that second frame is obtained, be the expression transmission opportunity recorded in the first frame value divided by
It indicates to terminate represented by the value obtained by the value of passed through period to second frame traffic since being sent the first frame
Period.
5. wireless communication device according to claim 1, has：
Receiving part sends the case where not receiving second frame in the defined period after the first frame in the sending part
Under, judge being failed for the transmission opportunity.
6. wireless communication device according to claim 5, wherein
The sending part sends in the case where the receiving part judges the acquisition failure of the transmission opportunity and indicates to abandon institute
State the frame of transmission opportunity.
7. wireless communication device according to claim 1, wherein
The value for the transmission opportunity that the expression third frame of the sending part recorded in the third frame is obtained, than described the
The value of expression transmission opportunity recorded in one frame divided by expression terminate since being sent the first frame to second frame traffic
In the case that value obtained by the value for the period passed through is big, the frame for indicating to abandon the transmission opportunity is sent, is indicated having sent
After the frame for abandoning the transmission opportunity, implement carrier sense.
8. a kind of terminal installation, is communicated with wireless communication device, have：
Receiving part receives the first frame for obtaining the transmission opportunity sent by the wireless communication device；And
Autonomous distributed controll portion, the information setting NAV of the period based on the expression transmission opportunity recorded in the first frame,
The autonomous distributed controll portion does not receive within the defined period after having received the first frame records expression
In the case of the frame of the information of BSS belonging to the wireless communication device, the NAV is reset.
9. terminal installation according to claim 8, wherein
The receiving part has the function of receiving trigger frame, it is that trigger frame instruction is sent by the wireless communication device, with
The wireless communication device is the transmission of the frame of destination,
And have sending part, based on recorded in the frame by the BSS transmissions different from the BSS belonging to the wireless communication device
Information in the case of setting NAV, and receive the trigger frame within the period of the NAV of the setting, is not sent with described
Wireless communication device is the frame of destination.
10. terminal installation according to claim 8, wherein
The receiving part receives the frame for abandoning the transmission opportunity for indicating to be sent by the wireless communication device,
Have：Sending part, receive indicate to abandon the frame of the transmission opportunity after send frame, the frame indicates：It sends
Indicate to abandon the frame of the transmission opportunity.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016002357A JP2019041136A (en) | 2016-01-08 | 2016-01-08 | Radio communication device and terminal device |
| JP2016-002357 | 2016-01-08 | ||
| PCT/JP2017/000219 WO2017119470A1 (en) | 2016-01-08 | 2017-01-06 | Wireless communication device and terminal device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108432328A true CN108432328A (en) | 2018-08-21 |
| CN108432328B CN108432328B (en) | 2022-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780005413.0A Active CN108432328B (en) | 2016-01-08 | 2017-01-06 | Wireless communication device and terminal device |
Country Status (5)
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|---|---|
| US (1) | US11134522B2 (en) |
| EP (1) | EP3402291A4 (en) |
| JP (1) | JP2019041136A (en) |
| CN (1) | CN108432328B (en) |
| WO (1) | WO2017119470A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018121095A (en) * | 2015-06-05 | 2018-08-02 | シャープ株式会社 | Radio communication device, communication method, and communication system |
| US10932292B2 (en) * | 2016-05-25 | 2021-02-23 | Lg Electronics Inc. | Method for transmitting frame in wireless LAN system, and wireless terminal using same |
| WO2017212807A1 (en) * | 2016-06-10 | 2017-12-14 | ソニー株式会社 | Wireless communication device |
| US20190229856A1 (en) * | 2016-07-15 | 2019-07-25 | Ntt Docomo, Inc. | User equipment and radio communication method |
| US11134403B2 (en) * | 2018-09-26 | 2021-09-28 | Apple Inc. | Rate feedback for wireless video streaming |
| WO2020128142A1 (en) | 2018-12-21 | 2020-06-25 | Nokia Technologies Oy | Wireless access establishment |
| EP3876469A1 (en) | 2020-03-03 | 2021-09-08 | Samsung Electronics Co., Ltd. | Apparatus and method employing multi-resource unit for user in a wireless local area network |
| WO2022254897A1 (en) * | 2021-05-31 | 2022-12-08 | シャープ株式会社 | Communication device and communication method |
| WO2023152843A1 (en) * | 2022-02-09 | 2023-08-17 | シャープ株式会社 | Wireless communication device and wireless communication method |
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- 2017-01-06 CN CN201780005413.0A patent/CN108432328B/en active Active
- 2017-01-06 US US16/068,282 patent/US11134522B2/en active Active
- 2017-01-06 EP EP17736007.0A patent/EP3402291A4/en active Pending
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Also Published As
| Publication number | Publication date |
|---|---|
| EP3402291A1 (en) | 2018-11-14 |
| US20190029041A1 (en) | 2019-01-24 |
| WO2017119470A1 (en) | 2017-07-13 |
| JP2019041136A (en) | 2019-03-14 |
| EP3402291A4 (en) | 2019-10-16 |
| US11134522B2 (en) | 2021-09-28 |
| CN108432328B (en) | 2022-08-30 |
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